Episode list

The captain of the special police department Shiryaev investigates a chain of bloody murders. By a lucky chance, he meets the Doctor of Mathematical Sciences, the extravagant Professor Stoppel.

With the help of formulas and calculations, Stoppel helps the police to get on the trail of a homicidal maniac. The scientist is appointed a consultant to the police.

A famous psychic is found dead in his office. During the investigation, Stoppel and Shiryaev get acquainted with the 17-year-old client of the psychic Katya Romanovskaya. With the help of an ingenious task, the mathematician and the investigator find the criminal, and also help Katya solve the mystery of her mother's disappearance.

The body of an unknown man is found in the apartment of an entrepreneur. Soon, a special department is assigned to investigate the murder of a husband and wife. Both crimes were committed with the same gun. Using a mathematical formula, Stoppel manages to find out what connected these strangers.

The businessman's son was abducted. Suspicion falls on his closest friend and former partner. Using a mathematical scheme, Stoppel once again calculates the real criminal and saves the child.

Modest office clerk Ivan opens fire on colleagues, and then commits suicide. After analyzing the behavior of the killer, Stoppel and Shiryaev manage to find out who actually directed this crime and prevent another death.

A famous jeweler was found murdered near his salon. Suspicion falls on his former assistant. Soon, a man suffering from amnesia is found near the crime scene. Shiryaev is sure that this is an accident, but Stoppel knows that probability theory almost completely excludes such coincidences.

The main suspects in the case of the murder of the owner of a construction company are deceived shareholders. However, Stoppel is convinced that the most obvious solution to the problem does not always turn out to be correct.